This series introduces interconnect debugfs files that support voting
for any path the framework supports.
We've historically relied on an out-of-tree module for this, which used
the old icc_get() that was recently removed in [0]. The old icc_get()
took integer endpoint IDs, which made identifying paths in our old
implementation non-intuitive. The logical node names typically don't
change much chip-to-chip, but the raw integer IDs do. Take this
opportunity to introduce an icc_get() that uses string names instead,
which allows for a more intuitive and generic debugfs interface.
We rely on this support for debug, test, and verification. Hopefully
it'll be useful for other vendors as well.
[0] commit 7dcdad6f32c9 ("interconnect: drop unused icc_get() interface")
Changes in v3:
- Use GFP_ATOMIC when allocating with the rcu lock held.
Changes in v2:
- Make icc_get() an internal interface.
- RCU-protect src_node and dst_node.
- Replace PLATFORM_DEVID_AUTO with PLATFORM_DEVID_NONE.
- Remove unnecessary #include.
- Add debugfs client documentation.
Mike Tipton (3):
debugfs: Add write support to debugfs_create_str()
interconnect: Reintroduce icc_get()
interconnect: Add debugfs test client
Documentation/driver-api/interconnect.rst | 25 ++++
drivers/interconnect/Makefile | 2 +-
drivers/interconnect/core.c | 66 +++++++++
drivers/interconnect/debugfs-client.c | 168 ++++++++++++++++++++++
drivers/interconnect/internal.h | 3 +
fs/debugfs/file.c | 48 ++++++-
6 files changed, 309 insertions(+), 3 deletions(-)
create mode 100644 drivers/interconnect/debugfs-client.c
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2.17.1
